1684993 has 2 divisors, whose sum is σ = 1684994. Its totient is φ = 1684992.

The previous prime is 1684979. The next prime is 1684999. The reversal of 1684993 is 3994861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1238769 + 446224 = 1113^2 + 668^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684993 - 2⁹ = 1684481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1684999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842496 + 842497.

It is an arithmetic number, because the mean of its divisors is an integer number (842497).

2^1684993 is an apocalyptic number.

It is an amenable number.

1684993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684993 is an equidigital number, since it uses as much as digits as its factorization.

1684993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 1684993 is about 1298.0728022727. The cubic root of 1684993 is about 118.9960924264.

The spelling of 1684993 in words is "one million, six hundred eighty-four thousand, nine hundred ninety-three".